gnlsStruct {nlme} | R Documentation

## Generalized Nonlinear Least Squares Structure

### Description

A generalized nonlinear least squares structure is a list of model components representing different sets of parameters in the nonlinear model. A `gnlsStruct` may contain `corStruct` and `varFunc` objects. `NULL` arguments are not included in the `gnlsStruct` list.

### Usage

    gnlsStruct(corStruct, varStruct)

### Arguments

`corStruct` | an optional `corStruct` object, representing a correlation structure. Default is `NULL`.
`varStruct` | an optional `varFunc` object, representing a variance function structure. Default is `NULL`.

### Value

a list of model variance-covariance components determining the parameters to be estimated for the associated nonlinear model.

### Author(s)

Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates bates@stat.wisc.edu

### See Also

`gnls`, `corClasses`, `varFunc`

### Examples

    gnls1 <- gnlsStruct(corAR1(), varPower())

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